<!DOCTYPE HTML>
<html>
<head>
	<meta charset="utf-8"/>
	<style type="text/css">
   
      div{
          
          width: 1000px;
          height: 2000px;
          /*主要是一列居中布局*/
          margin: 0px auto;
          background-color: red;

        
      }
       
     
	</style>
      

</head>
<body>
      
   <div></div>



</body>
</html>
